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Adjusting Offset and Gain Section 6-9
6-9-1 Adjustment Mode Operational Flow
The following diagram shows the flow of operations when using the adjust-
ment mode for adjusting offset and gain.
!Caution Be sure to turn OFF the power to the PLC before changing the setting of the
operation mode switch.
Set the operation mode switch to adjustment mode.
Turn ON the PLC.
When adjusting another I/O number
When adjusting the same I/O number
Set the I/O number.
Offset adjustment
Offset Bit ON
Set Bit ON
Turn OFF power to the PLC.
Set the operation mode switch to normal mode.
The ADJ indicator will flash while in adjustment mode.
Start up the PLC in PROGRAM mode.
Gain adjustment
Gain Bit ON
Input adjustment
Output adjustment
Set Bit ON
Input adjustment Output adjustment
Set the operation mode switch on the DIP switch
on the back panel of the Unit to adjustment mode.
Write the I/O number to be adjusted
in the rightmost byte of CIO word n.
(Bit 0 of CIO word
n+1 turns ON.)
Sampling
input
Adjustment
value setting
(Add inputs so that
conversion value
becomes 0.)
(Bits 2 and 3 of
CIO word n+1
turn ON.)
(Bit 4 of CIO word
n+1 turns ON.)
(Bit 1 of CIO word
n+1 turns ON.)
Sampling
input
Adjustment
value setting
(Add inputs so that
conversion value is
maximized.)
(Bits 2 and 3 of
CIO word n+1
turn ON.)
(Bit 4 of CIO word
n+1 turns ON.)
Set the operation mode switch on the DIP switch
on the back panel of the Unit to normal mode.
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